P4 Timeline
| Date | Protofour Development & MRSG | Protofour Society | Scalefour Society |
|---|---|---|---|
| July 1963 | "Progress in EEM gauge" published in MRN, the precursor of Protofour and first fruits of the MRSG | ||
| February 1964 | Again in MRN, more "Progress in EEM" | ||
| August 1966 | First article on Protofour by the MRSG published in MRN | ||
| January 1967 | Start of the 13 part MRC series on Protofour by the MRSG. This series got P4 on the move. | ||
| December 1967 | Studiolith supplies start P4 Newsletter No 1 | ||
| March 1969 | Protofour Society Inaugurated | ||
| June 1969 | P4 Society News sheet No 1 | ||
| June 1970 | South London Area Group formed | ||
| September 1970 | Initial issue of P4 Manual First issue 'Precision' | ||
| October 1973 | First Annual Convention | ||
| December 1973 | 'Heckmondwike' layout started by NLG in response to Cyril Freezer challenge | Newsletter 24 | |
| March 1974 | 'Prototype 1 | ||
| April 1974 | Ray Hammond introduced 'Scalefour' | ||
| September 1975 | Protofour Society split - Scalefour Society Founded | ||
| January 1976 | Newsletter No. 1 | ||
| February 1976 | Inaugural meeting | ||
| August 1976 | 'Scalefour Digest' commenced | ||
| October 1976 | Scalefour Society 1st logo with Scalefour News issue 4  |
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| Nov/Dec 1976 | Prototype 12 - first printed issue | Scalefour News number 5 introduced the 'Digest' | |
| October 1977 | First 'Scaleforum' held at the London Poly. | ||
| February 1978 | Ray Hammond introduced his even finer 'Scalefour' dimensions in Scalefour News No 11. | ||
| July - Sept 1978 | P4 Society proposed merger with S4 Society, acceptable conditions could not be agreed. | ||
| October 1978 | Scaleforum '78 at the Commonwealth Institute. Area groups reach 23. | ||
| April 1979 | Prototype 19 - reduced because of 'Precision' (which did not happen) | ||
| May 1979 | "Scaleforum North" and AGM in Bradford's Norfolk Gardens Hotel. | ||
| February 1980 | 21st Scalefour News, 'APT' logo introduced |
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| October 1980 | Scaleforum at Norfolk Gardens Hotel, Bradford. | ||
| January 1981 | NLG 'Bodmin' articles start in MRC | ||
| October 1981 | Scaleforum back at the Commonwealth Institute | ||
| April 1982 | Studiolith quit, Trans-Europ models start | ||
| October 1982 | New Scalefour logo for Scalefour News 34
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| Sepember 1984 | Scaleforum moved to City University | ||
| August 1985 | First Scalefour section at Railwells | ||
| 1986 | Prototype 47 - last issue | ||
| September 1986 | 'Broadsheet' introduced to supplement Scalefour News | ||
| December 1986 | S4 news to folded format from issue 54 | ||
| August 1987 | Protofour Society merged into Scalefour Society. | ||
| February 1988 | The Broadsheet/Newsheet became Bulletin No 5. | ||
| May 1988 | Scalefour North at Barnsley | ||
| April 1989 | Scaleforum North at Wakefield | ||
| June 1991 | 21st Anniversary of the South London Area Group | ||
| August 1991 | 25th Anniversary of P4 |  |
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| September 1991 | S4 news goes glossy from Issue 74. Scaleforum moved to Leatherhead | ||
| June 1998 | scalefour.org internet address registered | ||
| December 1998 | Current revision of P4 and S4 standards issued. | Scalefour Society Digest 1.2 (Issue 2.4), "P4 Track and Wheel Standards" issued | |
| September 2004 | P4 Talk mailing list inaugurated | ||
| 2005 | 1883 Challenge | ||
| 2008 | Diesel and Electric Challenge | ||
| June 2008 | Scalefour Forum inaugurated | ||
| September 2013 | Scaleforum moves to Stoke Mandeville Stadium, nr Aylesbury | ||
| April 2014 | Scalefour North moves to Queen Elizabeth Grammar School, Wakefield | ||
| February 2016 |  40th Anniversary of the Scalefour Society |
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| August 2016 | 50th Anniversary of P4 | ||